I think the right vote is Duran. With prospects, ceiling and projectabilty have a lot to do with it IMO. JD has boatloads of both. He probably has the highest ceiling of any prospect in the Reds' MiL system, and that's keeping in mind that I think very highly of Yonder Alonso and Neftali Soto. Given Francisco's glaring need to vastly improve his OBP skills, I gotta give the nod to Duran over him.
Having said all that, hopefully what JF is showing in the AFL can be sustained and subsequently carried over to AA. If so, we really do have a potential star on our hands.